For the Sensor and Time assignment I worked with Manuela. We decided to use a photocell to measure its performance in terms of volts / time.
This is the photocell I used. It is the simplest one, found in sparkfun for $1.50.
This is the information that you can find in Sparkfun’s webpage:
Description: This is a very small light sensor. A photocell changes (also called a photodetector, CdS or photoconductive cell) resistance depending on the amount of light it is exposed to. These little sensors make great ambient light triggers (when light in the room turns on, do something).
- Light resistance : ~1k Ohm
- Dark resistance : ~10k Ohm
- Max voltage : 150V
- Max power: 100mW
- 2 x 4 x 5mm
- 4mm between pins
- 31mm lead length
Arduino Code: http://itp.nyu.edu/~mbv227/?p=366
Processing Code: http://itp.nyu.edu/~mbv227/?p=368